空气污染与雾霾的英语作文
2014-01-05 · 知道合伙人软件行家
The main reason recently Harbin haze weather is the formation ofmeteorological conditions.
Harbin is not a day over the pollutant accumulation, 4 days earlier,Harbin has been air pollution problems, when Omaha continuous inhigh-pressure cold air control, like to wear a "hat" city so that contaminants do not spread, followed by warm air to the south, inthe muddy, warm air is brought in North China area pollution, air quality and to Harbin covered with a layer of ash. The static winduntil yesterday morning, the horizontal direction is not conducive to the diffusion of lead pollution, like "snowball" as more heap more,hold in the sky, eventually forming a haze.